Excavator



June 24, 1930. LE ROY P. CZU'i'TER EXCAVAT OR Filed Oct. 18 1926 3 Sheets-She et 1 R .E -I m. T4 N6 mm m E l ATTORNEY.

June 24, 1930.

LE ROY P. CLUTTER EXCAVATOR 3 Sheets-Sheet 2.

A TTORNE Y.

June 24, .1930.

LEV/ROY P. CLUTTER 1,765,905

EXCAVATOR 3 Sheets-Sheet 3 Filed Oct. 18, 1926 INVENTOR.

is For I? 62 urns/P A TTORNE Y.

Patented June 24, 1930 i'raoi s ArEs P T NT; OFF;

me P. 'Q UTTERQOFQDEER LICK, PENNSYLVANIAQASSIGNOR, BY MESNE Awa t,

r I aurie, 'ro .QLUITEBI-WAGNER, Ino.,n CORPORATION or 011101 ExoevA'roR Applioationiiiled October 18, 1926; Serial no. 142,183.

Thisinventionqrelates to excavators, and particularly to that type known as. ditchers used in digging trenches, cellars, etc. 7 i The chief obj ectoif-- the invention is to pron; ride in; an excavator, means for swinging an excavator scoopalong a path and means for shifting the'scoop. on the swinging meansv to maintain the scoop at-ani effective earth excavating'inclination throughout-the swing- 'ing movement thereof 1 V Another object of the invention is to provide the combination with an excavator, in-

V eluding a boom, and a dipper stick pivoted on the boom and carrying a scoop, of means '15 operableby shifting of the dipper stick relativetothe boom for shifting the :scoop on v the dippergsticksoithat it will be maintained at an earth excavating inclination in all positions'of thedipper stickfin'd boom. Thus zo'thecutting angle canhe imaintaine'd while operating thescoop along a path determined bymovement of both theistick and the boom.

' Particularly the invention has for its: ob-

' ject the provisionof means efiective upon an 245 excavator scoop mounted to, swing upon a support to increase the cutting angle thereof at the extremes of its movement, whereby the scoop can cut approximately along the vertical at the start of its crowding. move-- ,1 ment into earth and also effective to prevent the heel of the scoop from scraping against the earth as it moves therethrough toward the finish of the crowding movement.

" The foregoing and other objects are ob- 1 tained by the apparatus illustrated in the accompanying drawings and described below. It is to be understood that the invention is not limited to the specific form thereof shown and described;

Of the accompanying drawings, Figure 1 is a side elevation of apparatus embodying the invention; I Figure 2 is an end elevation, partly in I sectionfof the dipper, scoop and operating 7 means; V j I Figure 8 is a detail elevationshowing the position of the apparatus at the start of an! excavating operation;

x 7 Figure a is a similar View showing the "usual manner,

7 apparatus in an intermediate position during an excavating operation; and I Figure 5 is a similar view showing the apparatus its position at or near the completion of an excavating operation; Referring to the drawings, the numeral 10 represents a suitable power shovellapparatus'on which an apparatusembodying the invention; may be pivoted.. Thisap paratus includes a boom 11 pivoted on the platform of shovel apparatus 10 and having pivoted thereon, as at 12 on its free end a dipper stick'12, a portion of which projects slightly above boom 11 and has a'hoistline 13 connectedthereto and operable from apparatus 10, the lowerend of dipper stick 12 having pivoted thereon at 14, a scoop shown at. 15, the. pivot being adjacent theforward end of the scoop, crowding of whichis-accomplished by means of adrag line 16 operable 'frointthe shovel apparatuslO any suitable manner.

For shifting'scoop 15 during an excavat- I ing operation to maintain the scoop at an excavating angle throughout its movement, .alink 17 connects scoop 15 adjacent its rear end to a leverzl8 pivoted'at'18 on dipper ,stick'12 at a point outwardly and upwardly spaced. ifr om'the pivot 12*;of dipper stick .12 whenthe latter is substantially at right angles toboom l1.- Lever l8 is arranged to be operated by relative movement of'the stick 12and boom 11 by me'ans of a link 1%) connecting boom lliand lever 18.1 Link 17 is o'fgsuch lengthas to hold the scoop 15 at crowding movement; a a

In operation, at'thergstart of a ditching operation or in excavating cellars, the dipper stick, 12 moved to the initial position shown iii-Figure 3, this movement serving to actuate scoop- 15 tofanxincl'ination adapted final position shownv Figure 5, from any -of which positions theboom may be elec *vatedto dump thescoop of earth in: the. L

.an 'gexcavating lnclinationthroughout, its

It will be observed that the lever 18 is,

scoop from dragging on the earth at any desired path by combinedmovements of the stick and. the boom, ije. as excavating operaoted to swing in a vertical plane, a dipper a stick pivoted on the boom'to 'swlng insaid "point in the path over which the scoop is operated. The scoop is actuated along any tions proceed the scoop is actuated inwardly 'alonga flattened are by swinging the stick inwardly and lowering of the boomsi'mul taneously wlth the swinglng movement.

The above device isthus capable of nosing the scoop into the-earth so that it is at an" 4 effective angle at any point throughout the range of its movement due to combined action of the stick and boom. v

- JModifications of the inventlon may lbe; re

sorted to without departing from'the spirit thereof or the 'scope otthe appended claims.

l, -What is claimed s 111'. Excavating appa-ratus including a pivoted boom, *adip'per stick pivoted onthe boom, alscoop plvoted atits forward end on the dlpperstick, means for raislng and lowering 'the boom and-for swinging the dipper ystick thereon, a lever pivoted 'on'the dipper stick at a point spaced from the pivot otflthe latter on the boom, a link 'connecting one end of the levertothe boom, and alink connectiing the other endof the lever to'the rear end v of the scoop, wherebythescoop will be held "which 'it is operated; v a I 7 2; Excavating apparatus including *a pivoted'boom, a scoop" carrier pivoted on the at an.excavatinginclination to the path over boom, means for raising and lowering'the boom, means for'swinging the scoop carrier 'ontheboom to perform an excavating opera- 4o tio'n,'.-a scoop'pivoted adjacent its forward end on thescoopcarrier, a lever pivoted on thescoop carrier, ahnk connecting one end c scoop will be'maintained at an excavating in- 3. Excavating apparatus including a boom, a scoop carrier pivoted on the boom, means for swinging th'e s'coop'lcarrieron the'boom to perform an excavatinggoperatioma; scoop pivoted adjacent itstOrWard end on the .scoop carrier, a lever pivoted on-thescoop carrier, a link connecting the lever to the tothe scoop adjacent its rear en tremes 'ofits movements, 7 7

angle ofthe scoop relative tothe of the scoop.

actuated by relative arcuate movementof the ing movement thereof, whereby the scoop heel will be drawn relatively towardthecar- 5.7 In an excavating machine,a boomrpiva rier pivot as the scoop is swung to the explane, a scoop pivoted upon the dipper stick, is

and'means between the boom and scoop and scoop, means for, pivotally suspending: the

scoop from the support, and means between the support and scoop and operable by rela-' tive arcuatemovement of the suspending means and support for increasing the cutting means as the scoop isswungl'toward both extremes of its motion, 1

7. In an excavating machine, asupport,

scoop, means forfpivotally suspending'ythe scoop from thesupport, and means between t a r p 195' 5 tive arcuate movement of the suspending a the support and scoopland operable by relaa suspending means and a the support for increasing the] the suspending means "tosubstantially a vertical cutting position at one extremeof its] -movement and also for increasing said-cutting angle at the other extremeof-movement E RoY 'P, 'CLUTTER; I

of the lever to theboom, and another link connecting the other end ofthe lever to the; scoop adjacent" its rear end, whereby-the V i-2o boom, and another link connecting the lever whereby the scoop will be maintained at; an excavating inclination to the pathuover which it travels. J 4, Excavating apparatus including a sup- 7 port'fascoop' carrier pivoted'on the'support, 1 means for swinging-the scoop carrier on the r V I support, a scoop =pivoted-onthe-carrier, and means between the support andj scoop' and cutting angle of the scoop with respect to a I 

